Gas-insulated switchgear

Abstract

The invention relates to the field of gas insulated switch devices, in particular to an inflatable cabinet. The inflatable cabinet comprises a cabinet body, a compartment is arranged in the cabinet body and comprises a low-voltage chamber located on the front side of the cabinet body and a high-voltage chamber located on the rear side of the low-voltage chamber, the high-voltage chamber is divided into a switch chamber and an incoming and outgoing line chamber which are independently arranged up and down through a horizontal partition plate, and an incoming line side sleeve and an outgoing line side sleeve are installed on the horizontal partition plate. The wire inlet side sleeve and the wire outlet side sleeve are respectively provided with a sleeve interface exposed in the wire inlet and outlet chamber and a wiring end exposed in the switch chamber, and a three-position switch and a circuit breaker are connected in series between the wiring end of the wire inlet side sleeve and the wiring end of the wire outlet side sleeve in the switch chamber. According to the gas-insulated switchgear, the wire inlet and outlet chamber, the low-voltage chamber and the switch chamber are integrated into one gas-insulated switchgear, and one gas-insulated switchgear is adopted to realize the functions of a two-sided gas-insulated switchgear in the prior art, so that the occupied area is saved, and the material cost is saved.

Description

Technical Field

[0001] The invention relates to the field of gas insulated switchgear, in particular to a gas-filled cabinet. Background Art

[0002] Inflatable cabinets are widely used in power systems. In actual engineering applications, the primary system wiring scheme of the inflatable cabinet often requires the use of one cable incoming cabinet and one cable outgoing cabinet connected by busbars. This method of using two inflatable cabinets occupies a large area and requires high raw material costs. Summary of the invention

[0003] The object of the present invention is to provide an inflatable cabinet to solve the problem that the existing inflatable cabinet adopts a two-sided inflatable cabinet, which occupies a large area and requires high costs.

[0004] To achieve the above purpose, the inflatable cabinet of the present invention adopts the following technical solutions: An inflatable cabinet comprises a cabinet body, wherein a compartment is arranged in the cabinet body, wherein the compartment comprises a low-voltage chamber at the front side of the cabinet body and a high-voltage chamber at the rear side of the low-voltage chamber, wherein the high-voltage chamber is divided into a switch chamber and an inlet and outlet chamber independently arranged up and down by a horizontal partition, wherein an inlet side bushing and an outlet side bushing are installed on the horizontal partition, and both the inlet and outlet side bushings have bushing interfaces exposed in the inlet and outlet chambers and wiring terminals exposed in the switch chamber, and a three-position switch and a circuit breaker are connected in series between the wiring terminals of the inlet side bushing and the outlet side bushing in the switch chamber.

[0005] Furthermore, the incoming and outgoing line side bushings both include a busbar connecting bushing connected to an external busbar and a lightning arrester connecting bushing connected to a lightning arrester. The lightning arrester is connected to the bushing interface of the lightning arrester connecting bushing. The incoming and outgoing line side busbars are respectively connected to the bushing interfaces of the busbar connecting bushing. The lightning arrester and the incoming and outgoing line side busbars are all located in the incoming and outgoing line room.

[0006] Furthermore, current transformers are respectively connected to the incoming-side busbar and the outgoing-side busbar.

[0007] Furthermore, the outgoing line side bushing also includes a transformer connecting bushing, and a bushing interface of the transformer connecting bushing is connected to a voltage transformer.

[0008] Furthermore, the inlet and outlet chambers are divided into independent inlet chambers and outlet chambers by vertical partitions and respectively accommodate corresponding electrical components.

[0009] Furthermore, the inlet and outlet chambers are divided into independent inlet chambers and outlet chambers by vertical partitions and respectively accommodate corresponding electrical components.

[0010] Furthermore, the lightning arresters and current transformers in the incoming line chamber and the outgoing line chamber are symmetrical about the vertical partition.

[0011] Furthermore, the high-pressure chamber is an inflation chamber, a pressure relief chamber is provided at the rear side of the high-pressure chamber, explosion-proof valves are provided on the partition between the pressure relief chamber and the switch chamber and on the partition between the pressure relief chamber and the inlet and outlet line chambers, and a pressure relief plate is provided on the vertical partition.

[0012] Furthermore, a pressure relief channel is provided on the top of the pressure relief chamber, and a pressure relief cover is provided on the top of the pressure relief channel.

[0013] Furthermore, a three-position switch is installed on the side wall separating the low-voltage chamber and the switch chamber, and the grounding terminal of the three-position switch is located on one side of the low-voltage chamber. The grounding terminal of the three-position switch is connected to the main grounding busbar, and the main grounding busbar passes through the low-voltage chamber and the inlet and outlet line chamber into the pressure relief chamber and is connected to the grounding block at the bottom of the pressure relief chamber.

[0014] Beneficial effects: The inflatable cabinet of the present invention is a pioneering invention. Specifically, it includes a low-voltage chamber located at the front side of the inflatable cabinet body and a high-voltage chamber located at the rear side of the low-voltage chamber. The high-voltage chamber is divided into a switch room and an inlet and outlet line chamber independently arranged above and below by a horizontal partition. The partition partition is penetrated by inlet and outlet side bushings. The incoming bus cable is connected to the bushing interface of the incoming side bushing from the lower incoming line chamber located at the bottom of the cabinet body. A three-position switch and a circuit breaker are connected in series between the wiring terminals of the incoming and outgoing side bushings in the switch room. The bushing interface of the outgoing side bushing is connected to the primary wiring mode of the outgoing bus cable. The inflatable cabinet integrates the incoming and outgoing line chambers, low-voltage chambers and switch chambers in the prior art into one inflatable cabinet, and uses one inflatable cabinet to realize the functions of incoming and outgoing lines of two inflatable cabinets in the prior art, saving space and material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A side view showing the internal structure of an embodiment of the inflatable cabinet of the present invention; Figure 2 for Figure 1 Enlarged view of the switch room structure.

[0016] In the figure: 1. low voltage room; 11. cabinet; 2. main grounding busbar; 3. outgoing line room; 4. voltage transformer; 5. plug-in arrester; 6. current transformer; 7. incoming line room; 8. vertical partition; 9. pressure relief room; 91. pressure relief channel; 10. switch room; 101. horizontal partition; 11. three-position switch; 12. circuit breaker; 13. voltage transformer connecting bushing; 14. lightning arrester connecting bushing on the outgoing line side; 15. busbar connecting bushing on the outgoing line side; 16. busbar connecting bushing on the incoming line side; 17. lightning arrester connecting bushing on the incoming line side; 18. explosion-proof valve; 19. supporting insulator; 20. copper busbar; 21. maintenance cover plate; 22. bushing on the incoming line side; 23. bushing on the outgoing line side. DETAILED DESCRIPTION

[0017] The present invention integrates a low-voltage room, an inlet and outlet room, a switch room, etc. into an inflatable cabinet, adopts a primary wiring method in which an inlet bus cable enters from the inlet and outlet room at the bottom of the inflatable cabinet to the switch room at the top of the middle part of the inflatable cabinet, and then connects three-position switches and circuit breakers in series, and then goes out to the inlet and outlet room at the bottom of the inflatable cabinet to connect to the outlet bus cable.

[0018] Based on the above conception, as a basic embodiment, the inflatable cabinet of the present invention includes a cabinet body 11, and a compartment is arranged in the cabinet body 11, and the compartment includes a low-voltage chamber 1 at the front side of the cabinet body and a high-voltage chamber at the rear side of the low-voltage chamber. The high-voltage chamber is divided into a switch chamber 10 and an inlet and outlet chamber independently arranged above and below by a horizontal partition 101. An inlet side bushing 22 and an outlet side bushing 23 are installed on the horizontal partition 101, and the inlet and outlet side bushings both have bushing interfaces exposed in the inlet and outlet chambers and wiring terminals exposed in the switch chamber. A three-position switch 11 and a circuit breaker 12 are connected in series between the wiring terminals of the inlet side bushing 22 and the outlet side bushing 23 in the switch chamber.

[0019] In one embodiment, if Figure 1-2 As shown, the low-voltage chamber 1 is located at the top of the inflatable cabinet, near the cabinet door of the cabinet body 11, and the switch chamber 10 is located at the top of the middle position of the cabinet body 11 and is arranged adjacent to the low-voltage chamber 1; the inlet and outlet chamber is located at the bottom of the cabinet body 11, which is an integral compartment and is separated from the switch chamber 10 at the top by a horizontal partition 101. In order to facilitate later maintenance, preferably, a vertical partition 8 is provided inside the inlet and outlet chamber, and the vertical partition 8 separates the inlet and outlet chamber into an independent inlet chamber 7 and outlet chamber 3, and the outlet chamber 3 or the inlet chamber 7 can be arranged on the side adjacent to the low-voltage chamber 1.

[0020] The incoming line chamber 7 is provided with a plug-in arrester 5, a current transformer 6 and an incoming line busbar. The current transformer 6 is arranged at the proximal end of the vertical partition 8, and the plug-in arrester 5 is arranged at the distal end of the vertical partition 8; the outgoing line chamber 3 is also provided with a plug-in arrester 5, a current transformer 6, a voltage transformer 4 and an outgoing line busbar. In order to make the layout inside the incoming and outgoing line chambers more regular and facilitate later replacement and maintenance, preferably, the plug-in arrester 5 in the incoming line chamber 7 and the outgoing line chamber 3 is symmetrical about the vertical partition 8, and the current transformer 6 in the incoming line chamber 7 and the outgoing line chamber 3 is symmetrically arranged about the vertical partition 8. In order to make full use of the internal space of the incoming and outgoing line chambers, preferably, the outgoing line chamber 3 is arranged near the bottom of the low-voltage chamber 1, and the voltage transformer 4 is arranged at the bottom of the low-voltage chamber 1.

[0021] The incoming line side bushing 22 includes an incoming line side busbar connecting bushing 16 and an incoming line side lightning arrester connecting bushing 17. The bushing interface of the incoming line side busbar connecting bushing 16 is connected to the incoming line bus through a cable terminal. The bushing interface of the incoming line side lightning arrester connecting bushing 17 is connected to the plug-in lightning arrester 5. The current transformer 6 in the incoming line room 7 is sleeved on the incoming line side busbar.

[0022] The outgoing line side bushing 23 includes an outgoing line side busbar connecting bushing 15, an outgoing line side lightning arrester connecting bushing 14 and a voltage transformer connecting bushing 13. The bushing interface of the outgoing line side busbar connecting bushing 15 is connected to the outgoing line bus through a cable terminal, the bushing interface of the outgoing line side lightning arrester connecting bushing 14 is connected to the plug-in lightning arrester 5, the bushing interface of the transformer connecting bushing is connected to the voltage transformer 4, and the current transformer 6 in the outgoing line chamber 3 is sleeved on the outgoing line busbar cable.

[0023] A support insulator 19 and a copper busbar 20 are also provided in the switch room 10. The support insulator 19 is fixed on the side wall of the switch room 10. The copper busbar 20 is used to connect in series the terminal of the incoming line bushing 22, the three-position switch 11 and the circuit breaker. The support insulator 19 is used to support the copper busbar connected between the incoming line bushing 22 and the three-position switch 11.

[0024] An inspection seal plate 21 is installed on the top plate of the switch room 10. The inspection seal plate 21 is used for maintenance personnel to inspect the circuit breaker 12 or the three-position switch 11 at a later stage, and can be opened from the top of the switch room 10 for inspection. The switch room 10, the incoming line room 7 and the outgoing line room 3 are all inflatable chambers. An explosion-proof valve is arranged on the rear side plate or the top plate of the switch room 10. When a fault occurs in the switch room 10, the explosion-proof valve can be broken through to release pressure to the rear or top of the switch room; a pressure relief plate is arranged on the vertical partition 8 between the incoming line room 7 and the outgoing line room 3, and an explosion-proof valve is arranged on the rear side plate of the incoming line room. When a fault occurs in the outgoing line room 3, the pressure in the outgoing line room 3 can break through the pressure relief plate on the vertical partition 8 and the explosion-proof valve on the side plate of the incoming line room 7 to release pressure. When a fault occurs in the incoming line room 7, the pressure in the outgoing line room 7 breaks through the explosion-proof valve on its side wall to release pressure to the rear.

[0025] In order to allow each compartment to relieve pressure through a set airflow channel during pressure relief to prevent accidental injury to peripheral equipment or maintenance personnel of the inflatable cabinet, preferably, a pressure relief chamber 9 is arranged at the rear side of the switch room 10 and the incoming line room 7, and the pressure relief chamber 9 is located at the rear of the cabinet body 11. A pressure relief channel 91 is arranged at the top of the pressure relief chamber 9, and a pressure relief cover is arranged at the top of the pressure relief channel 91.

[0026] When a fault occurs in the switch room 10, the gas pressure breaks through the explosion-proof valve 18 and enters the pressure relief chamber 9, and the gas pressure is discharged upward along the inner wall of the pressure relief chamber 9 through the pressure relief channel 91 at the top of the pressure relief chamber 9; when a fault occurs in the outlet chamber 3, the gas pressure in the outlet chamber 3 breaks through the pressure relief plate on the vertical partition 8 and the explosion-proof valve 18 on the side plate of the incoming chamber 7 and enters the pressure relief chamber 9, and is discharged upward along the inner wall of the pressure relief chamber 9 through the pressure relief channel 91 at the top of the pressure relief chamber 9; when an outgoing line fault occurs in the incoming chamber 7, the gas pressure in the outlet chamber 7 breaks through the explosion-proof valve 18 on its side wall and enters the pressure relief chamber 9, and is then discharged upward along the inner wall of the pressure relief chamber 9 through the pressure relief channel 91 at the top of the pressure relief chamber 9.

[0027] The three-position switch 11 and the circuit breaker 12 are respectively installed on the side walls separating the low-voltage chamber 1 and the switch chamber 10. The grounding terminal of the three-position switch 11 is located on the partition on one side of the low-voltage chamber 1. The grounding terminal of the three-position switch 11 is connected to the main grounding busbar 2. The main grounding busbar 2 passes through the low-voltage chamber 1, the outgoing line chamber 3 and the incoming line chamber 7, enters the pressure relief chamber 9, and is connected to the grounding block at the bottom of the pressure relief chamber 9. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An inflatable cabinet, characterized in that: The invention comprises a cabinet body, wherein a compartment is arranged inside the cabinet body, wherein the compartment comprises a low-voltage chamber at the front side of the cabinet body and a high-voltage chamber at the rear side of the low-voltage chamber, wherein the high-voltage chamber is divided into a switch chamber and an inlet and outlet chamber independently arranged up and down by a horizontal partition, wherein an inlet-side bushing and an outlet-side bushing are installed on the horizontal partition, and both the inlet-side and outlet-side bushings have bushing interfaces exposed in the inlet-outlet chamber and wiring terminals exposed in the switch chamber, and a three-position switch and a circuit breaker are connected in series between the wiring terminals of the inlet-side bushing and the outlet-side bushing in the switch chamber.

2. The inflatable cabinet according to claim 1, characterized in that: The incoming and outgoing line side bushings both include a busbar connecting bushing connected to an external busbar and a lightning arrester connecting bushing connected to a lightning arrester. The lightning arrester is connected to the bushing interface of the lightning arrester connecting bushing. The incoming and outgoing line side busbars are respectively connected to the bushing interfaces of the busbar connecting bushing. The lightning arrester and the incoming and outgoing line side busbars are all located in the incoming and outgoing line room.

3. The inflatable cabinet according to claim 2, characterized in that: Current transformers are respectively connected to the incoming-side busbar and the outgoing-side busbar.

4. The inflatable cabinet according to claim 1, characterized in that: The outgoing line side bushing also includes a transformer connecting bushing, and a bushing interface of the transformer connecting bushing is connected to a voltage transformer.

5. The inflatable cabinet according to claim 1 or 2, characterized in that: The inlet and outlet chambers are divided into independent inlet and outlet chambers by vertical partitions and contain corresponding electrical components respectively.

6. The inflatable cabinet according to claim 3, characterized in that: The inlet and outlet chambers are divided into independent inlet and outlet chambers by vertical partitions and contain corresponding electrical components respectively.

7. The inflatable cabinet according to claim 6, characterized in that: The lightning arresters and current transformers in the incoming and outgoing line rooms are symmetrical about the vertical partitions.

8. The inflatable cabinet according to claim 5, characterized in that: The high-pressure chamber is an inflation chamber, and a pressure relief chamber is arranged at the rear side of the high-pressure chamber. Explosion-proof valves are arranged on the partition between the pressure relief chamber and the switch chamber and on the partition between the pressure relief chamber and the inlet and outlet line chambers, and a pressure relief plate is arranged on the vertical partition.

9. The inflatable cabinet according to claim 8, characterized in that: A pressure relief channel is arranged on the top of the pressure relief chamber, and a pressure relief cover is arranged on the top of the pressure relief channel.

10. The inflatable cabinet according to claim 8 or 9, characterized in that: The three-position switch is installed on the side wall separating the low-voltage chamber and the switch chamber. The grounding terminal of the three-position switch is located on one side of the low-voltage chamber. The grounding terminal of the three-position switch is connected to the main grounding busbar. The main grounding busbar passes through the low-voltage chamber and the inlet and outlet line chamber into the pressure relief chamber and is connected to the grounding block at the bottom of the pressure relief chamber.

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